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No. 752,563. PATENTEDFEB. 16, .1904.

G. L. KELLER.

BASCULE BRIDGE. APPLIOATIION FILED r23. 26. 1902. no 11011111..{SHEETS-SHEET 1.

No. 752,563. PATENTED FEB. 16, 1904.

c; L. KELLER. BASGULE BRIDGE.

APPLICATION FILED IBB. 26, 1902; H0 MODEL. I 4 SHEETS-SHEET 2.

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- U. L. KELLER.

BASGULE BRIDGE.

APPLICATION FILED FEB. 26, 1902. H0 MODEL. SHEETS-SHEET 3.

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No. 752,563. PATENTED-FEB. 16, 1904.

0. L. KELLER. I BASGULE BRIDGE.

APPLICATION FILED FEB. 26. 1902.

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I UNITED STATES Patented February 16, 1904.

T T OFFICE, I

CHARLES L. KE LLnn orcII cAGo, IILLINoIs, ASSIGNOR TO THE SCHERZER,ROLLING LIrr BRIDGE COMPANY, or CHICAGO, ILLINOIS, AcoRroR T oN or:LLINoIs. I I I jeAseuteem e SPECIFICATION forming part of Letters PatentN01 752,563, dated February 16, 1904.

, Application filed February 26,1902. seen Ia. 95,675. (No model.)

T0 ctZZ whom it may concern. I

Be it known that I, CHARL S L. KELLER, of Chicago, in the county of Cookand State of Illinois, have invented certain new anduseful Improvementsin Bascule-Bridges; and I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings, and

.to the letters of reference marked thereon, which form a part of thisspecification.

This invention relates to bascule or lift bridges of that kind whereinthe bridge is opened and closed by the swinging movement of a movablespan or spans in a vertical plane,

and refers more particularly to the location and construction of theactuating devices for the movable span. The invention consists in thematters hereinafter set forth, and more particularly pointed out in theappended claims.

As shown in the drawings, Figure 1 is a view in side elevation of theinner or shore end of one leaf of a two-leaf bascule-bridge and itsassociated piers and approach. Fig. 2 is a similar view, in sideelevation, showing the movable span partially lifted. Fig. 3 is atransverse section taken on line 3 30f Fig. 1 Fig. 4 is a detail viewillustrating the. construction of the operating strut and pin ion. Fig.5 is a detail view showing a modified arrangement of the operating strutand pinion wherein the pinion is located beneath the strut. Figs. 6 jand 7 are detail views showing modifications in which the racks arecurved. Figs; 8 and 9 show a modification 1 i The bridge illustratedisof the kind or type known as a through-bridge, and it embraces twotrusses and a bridge-floor or floor-frame C, supported on the lowerparts of the trusses and-adjacent to the lower chords thereof, so

well as to the flooring of a highway-bridge,

such as is herein illustrated.

At the inner or shore end of the span the sameis provided with rollingsegments D D,

I which are attached to and form parts of the trusses of, the movablespan and are adapted to rest and roll on horizontal supports E E, whichare located on either side of the approach-floor B. Anchored columns E,E are locatedlateither side of the bridge-approach, andthebridge-trusses are at the inner or shoreend of the span ,extended beyondthe rolling segments, so as to form integral arms, which are adapted forcontact with limitingstops on the columns E E... These stops are formedby a horizontal beam or girder E which isf attached to the tops of theanchored columns and extends transversely over the approach B. Theextensions of thetrusses when the span is closed or in horizontalposition bear upwardly against said girder, as shown in Fig.

1, and thereby holds from downward movement thefree end of the span. Thebridge illustrated is therefore one of what is known as ,cantaliverbridge,or one wherein the com. plete bridge consists of two spans whichmeet each otherbetween the abutments and wherein both spans are held intheir horizontal positionsby'limiting-stops, such as those afiorded bythe beam or girder E or like means. It

will be understood,however, in case of a singlespanzlift bridge therising and falling end of thespan may rest when closed on an abutment atthe opposite side of the waterway, inwhichcase said limiting-stops willnot be required and the anchored columns E may be omitted.

The bridgerspan illustrated is also provided with counterbalance-weightsF, which are at: tached to the bridge-trusses with their centers ofgravity outside of and above the rolling segments.

The supports E for the rolling segments D are shown as having the formof'girders which rest on the piers A A. The bearing-faces of the rollingsegments and the top surfaces of the supports or girders are providedwith means for preventing the slipping or shifting of the segments onthe said supports,the same, as herein shown, consisting of teeth 6e,-arranged at intervals along the girders, and holes or recesses in thecurved faces of the segments adapted to receive or engage said teeth. ,7

Now referring to the actuating mechanism by which the bridge-leaf isopened and closed, G G designate operating-struts which are arrangedhorizontally above and at either side of the approach exterior to theplanes of the bridge-trusses and the rolling segments. In the particularconstruction herein shown said struts G are supported at their outerends by means of columns G, which are attached to the girders E E bymeans of brackets E which extend outwardly from the said girders and towhich the said posts or columns G are rigidly secured at their lowerends. The brackets E illustrated are adapted for supporting thefoot-path of the roadway, but are utilized for the attachment of thesaid columns, as above described. At their opposite or inner ends thestruts G are shown as secured to the anchored columns E E, which latterare of course located outside of the plane of the trusses and therolling segments, so that they are in position for the support of thesaid struts. The struts may, however, be supported otherwise than by theanchored columns in case the same be not present or if for some otherreason it may be found convenient to otherwise support the struts. Saidstruts are, moreover, braced or held from horizontal movement or fromshifting endwise under the strains coming thereon in the lifting of thebridge-span by means of oblique braces G reaching from the outer end ofsaid struts downwardly to the bases of the anchored columns E. The saidstruts G are provided with or formed to constifor instance, as anelectric motor I. Thegearpinions H, which are located at the oppositesides of the bridge-span in position to engage the operating struts, areherein shown as mounted on the outer ends of short shafts H,

which are provided with rigidly-attached gearwheels H located inside ofthe trusses and arranged to intermesh with gear pinions J J on atransverse horizontal shaft J, which extends across the span between thetrusses.

Said shaftJ is shown as driven from the motor'I by'means ofgearing'consisting of a counter shaft K, having a gear-pinion 71, whichintermeshes with a spur-wheel J 2 on the shaft J, and having also agear-wheel k, which intermeshes with a gear-pinion z' on thedrivingshaft 1 of the motor I.

In the construction shown in Figs. 1, 2, and 3 the operating-struts Garestraight and are arranged horizontally, so that they are parallel withthe upper 'or supporting surfaces of the girders E, and the axes ofrotation of the pinion H are arranged concentrically with respect to therolling segments D, so that the path of movement of said pinion as thebridgespan turns or rolls on the supports for the rolling segments willbe straight and horizontal and. the gear-pinions will remain inengagement with the straight operating-struts during the lifting orswinging movement of the span, the operation'of the parts in thisrespect beingclearly shown in Figs. 1 and 2.

The operating-struts Gmay be constructed in any suitable manner toafford necessary racks or gear-teeth for engagement with the pinions H,as shown in Figs. 1 to 4 said operatingstruts consisting each of twoparallel beams g, in which are secured transverse pins g, Fig. 4:, whichpins are adapted for engagement with the teeth of the gear-pinion H.

It is not essential that the actuating-pinions H when used in connectionwith the stationary operating-struts in the manner described should bearranged above the operating-struts, as they may be placed below thesame, as shown in Fig. 5, wherein the operating-strut indicated by G isprovided with a rack-bar g on its lower edge and supported by twocolumns Gr Gr and oblique brace G Moreover, it is not essential thatsaid pinions should be arranged concentrically with the bearing surfacesof the rolling segments, it

merely being necessary if the arrangement of the actuating-pinions benot concentric to give such curvature to the operating-struts as may berequired for maintaining the pinions in engagement with the strutsduring the movement of said pinions, a construction in which the pinionsare arranged eccentrically with respect to the rolling segments and thestationary operating-struts are provided with curved racks, as shown inFigs. 6 and 7 Fig. 6 showing the pinions above and Fig. 7 showing thembelow the operatingstruts and curved rack-bars g thereon. Theoperatingstruts indicated by Gr Gr in Figs. 6 and 7 are shown assupported by columns G G, attached at their lower ends to the outerfaces 'of the segment-supporting girders E or other stationary parts andas held from endwise one of two posts N N and at its opposite end to thedrum. The parts are so arranged that when the drum is turned one cablewill be wound upon and the other unwound from the drum, so that the drumwill be carried backward or forward between the posts, according to thedirection in which the drum is turned. The'postsN N will be connected bya strut N, the posts and strut being located in position correspondingwith that of the columns G and E. (Shown in Figs. 1 to 3.) Inclinedbraces N N are shown as arranged to hold in place the upper ends of theposts N N, said braces being located outside of the plane of movement ofthe windingdrum.

The construction described in span-actuating device wherein the rotativemotor-driven parts on the span are adapted to act in connection withstationary engaging means on the shore or bridge-approach to give thedesired swinging movement of the span has the advantage over those priorconstructions wherein the operatingstrut is an endwisemovable partconnected with the span and driven by actuating devices on thebridge-approach, for the reason that the actuating devices thus arrangeddo not extend shoreward for any considerable distance from the shore endof the bridge-span, so that less space is required for the bridgestructure as a whole than in cases where the operating-strut is movableendwise. In some instances-as, for instance, where there is a railroador highway crossing closely adjacent to the end of the movablespan-space cannot be well spared for the projection of theendwise-movable strut outwardly over the bridge-approach, and in suchcases the construction here shown is of great advantage, because thestationary operatin -struts need not extend shoreward to anyconsiderable distance past the inner ends of the supports A A on whichtherolling segments rest.

Inasmuch as the advantages hereinbefore set forth will be obtained bythe use of a rotative motor-driven part on the movable span when saidpart is driven by a motor located elsewhere than on the span, I do notdesire to be limited to a construction embracing a motor mounted on orcarried by the span, except as this feature is made the subject ofspecific claims.

While the construction embracing stationary operating-struts providedwith ratchetteeth and gear-pinions intermeshing with the same constitutean important feature of my invention and are herein claimed as a featureof my invention, means other than such racks and gear-pinions may beemployed to afford operative connections between a rotating motor-drivenpart on the bridge-span, such as the shafts H H and stationary parts onthe bridge-approach adapted to afford the desired swinging movement ofthe span. Such a device is shown in Fig. 8 and has been hereinbeforedescribed. Actuating means for rolling lift-bridge spans embracing arotative driven part on the bridge-span and connections between saiddriven part and a stationary part of the bridge-approach is thereforeherein broadly claimed as part of my invention.

It will be understood that the actuating means herein described may beappiled to bascule-bridges which are movably supported otherwise than byrolling segments, and such actuating means is therefore broadly claimedwithout restriction to any specific form of bascule-bridge. Suchactuating means may be used also in connection with deck as well asthrough bridges and in connection with the arch as well as thecantaliver form of basculebridges. 1

I claim as my invention? 7 1. The combination with the movable span of abascule-bridge and means for supporting said movable span, of a rotativenon-supporting part on the span, and means attached to a stationary partand operating in connection with said rotating part to giverising-and-falling movement to the span.

2. The combination with the movable span of a bascule-bridge and meansfor supporting said movable span, of a non-supporting rotative part onthe span, a motor connected with said rotative part for driving thesame, and means attached to a stationary part and operating inconnection with said rotative part to 4 giving rising-and-fallingmovement to the rotative span.

3. The combination with a rolling liftbridge span provided with rollingsegments, and supports .on which said segments rest and roll, of amotor-driven, rotative part on the span, and means attached to astationary sup port and operating in connection with said rotative partto give rising-and-falling movement to the span.

4. The combination with the movable span of a bascule-bridge and meansfor supporting said movable span, of actuating means embracing amotor-driven, revoluble, non-supporting pinion on the span, and astationary operating-strutprovided with a rack adapted for engagementwith said pinion.

5. The combination with a bridge span or leaf provided with rollingsegments, and stationary supports for said segments, of means foractuating the span comprising stationary operating-struts located at thesides of the rolling segments and provided with racks, and motor-drivengear-pinions on the span engaglng said racks.

tionary girders located on either side of the bridge-approach andaffording supports for said segments, of operating-struts located abovethe level and outside of the planes of said girders, said struts beingprovided with said movable span, of a motor on the span,

and means driven by said motor and operating in connection withnon-supporting coacting parts on the bridge-approach to giverising-and-falling movement to the span.

In testimony that I claim the foregoing as my invention I aflix mysignature, in presence of two witnesses, this 22d day of February,

CHARLES L. KELLER. Witnesses:

O. CLARENCE PooLE, GERTRUDE J. BRYcE.

